7 мм буровые штылки
Operational Precautions for the Integrated Drilling and Piling Machine:
Benefits of Spiral Drill Bit Teeth
The reason:
Inlet valve is not open or has silted
Suction line resistance is too high or blocked
Suction height is too high
Inlet valve is not open or has silted
Suction line resistance is too high or blocked
Suction height is too high